1. To make the mango puree, put the quartered mango and lime juice in a jug and blitz with a hand blender till smooth.

2. In a jug, pour half of the syrup and add the mint leaves. Bash with a wooden spoon. Add ice and mango chunks to 4 glasses, pour the syrup, rum, mango puree, lime juice and soda water over each. Mix with a long spoon or knife and enjoy.